When we want to make a lasting and meaningful upgrade to our ride, a high-quality bottom bracket is at the top of our list. The Cane Creek Hellbender 70 BB30 Bottom Bracket is a quality bottom bracket made with precision and premium materials. The cups are made from anodized machined aluminum for a durable and great-looking design, and the 440C stainless steel bearings are super durable and corrosion-resistant. Marine grease keeps everything in perfect working order and ensures no water gets into the bearings, while a dual lip seal helps keep the internals free of debris and contamination.